Here are the most important figures from the biggest political scandal in American history.
Howard Baker As Tennessee's first popularly elected Republican senator, Baker served as vice chairman of the Senate Watergate Committee. His position as investigator of the Nixon administration's misdeeds may have been a bit awkward — his 1972 campaign literature described him as a "close friend and trusted advisor of our President, Richard M. Nixon." During the committee's proceedings, he captured the essence of the committee's inquiry with a succinct question that became a Washington mantra: "What did the president know, and when did he know it?" Baker had a successful political career, serving three terms in the U.S. Senate from 1967-85, with stints as minority leader (1977-81) and as majority leader (1981-85). He was a candidate for the Republican presidential nomination in 1980 and received the Presidential Medal of Freedom in 1984. He also served as chief of staff for President Ronald Reagan in 1987-88 and later served as U.S. ambassador to Japan from 2001 to 2005. AP Buy Photo